For some weapon enhancement spells, such as Sun Metal and Magic Weapon, there are saving throws listed in the description. For Sun Metal, it's "Fort negates (object), and for Magic Weapon, it's "Will negates (harmless, object)".
I don't understand what these saving throws are doing, or what they are for? Do they mean that if the target of the weapon attack saves, then the enhancement disappears? I'm not sure that makes any sense?
Or, do these saving throws only apply if the benefactor of the spell is somehow unwilling, and wants to resist the spell?
Thanks for any help on this.